Passivation solution for soft roll lithium battery and packaging material of soft roll lithium battery

A soft-pack lithium battery and passivation solution technology, which is applied to battery pack components, metal material coating technology, circuits, etc., can solve problems such as difficulty in meeting the requirements of power soft-pack lithium batteries and decreased adhesion, and achieve a solution Severe decrease in adhesion performance or delamination, enhanced interlayer adhesion, and improved hydrofluoric acid resistance

Inactive Publication Date: 2018-06-19
乐凯胶片股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] European patent document WO2016 / 052294 discloses a packaging material for batteries. However, after the packaging material is resistant to electrolyte for a long time, the adhesive force between the heat-sealing layer and the aluminum foil layer is severely reduced or the two layers are delaminated, which is difficult to meet the requirements of the power soft battery. Requirements for Packing Lithium Batteries

Method used

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  • Passivation solution for soft roll lithium battery and packaging material of soft roll lithium battery
  • Passivation solution for soft roll lithium battery and packaging material of soft roll lithium battery
  • Passivation solution for soft roll lithium battery and packaging material of soft roll lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The formula of passivation solution is as follows:

[0049]

[0050] Coat the above passivation solution on the cleaned 30μm aluminum foil, and after drying, apply it on both sides to obtain a passivation treatment layer on the surface of the aluminum foil with a dry thickness of 200nm. The maleic anhydride modified polypropylene adhesive with a dry thickness of 3 μm is combined with a 30 μm CPP film to obtain a lithium battery packaging material, and its performance is tested after aging.

Embodiment 2

[0052] The formula of passivation solution is as follows:

[0053]

[0054] Coat the above passivation solution on the cleaned 30μm aluminum foil, and after drying, apply it on both sides to obtain a passivation treatment layer on the surface of the aluminum foil with a dry thickness of 150nm. The maleic anhydride-modified polypropylene adhesive with a thickness of 3 μm is combined with a 30 μm CPP film to obtain a lithium battery packaging material, and the performance is tested after aging.

Embodiment 3

[0056] The formula of passivation solution is as follows:

[0057]

[0058] Coat the above passivation solution on the cleaned 40μm aluminum foil, and after drying, apply it on both sides to obtain a passivation treatment layer on the surface of the aluminum foil with a dry thickness of 300nm. The maleic anhydride modified polypropylene adhesive with a dry thickness of 5 μm is combined with a 40 μm CPP film to obtain a packaging material for 3C lithium batteries, and the performance is tested after aging.

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Abstract

The invention relates to a passivation solution for a soft roll lithium battery and a packaging material of the soft roll lithium battery. The passivation solution comprises, by weight part, 0.3 to 1part of a metallic compound, 0.5 to 2 parts of organic acid, 0.5 to 2 parts of film forming polymer, 0.1 to 1 part of bonding resin and 100 to 200 parts of water. The invention further relates to a packaging material for the soft roll lithium battery. The packaging material is composed of a heat resisting layer, a first adhesive layer, an aluminum foil surface passivation treatment layer, an aluminum foil layer, an aluminum foil surface passivation treatment layer, a second adhesive layer and a heat seal layer. The aluminum foil surface passivation treatment layer is formed by coating of the passivation solution on the surface of the aluminum foil. The problem that in the long-term electrolyte resistance operation, bonding performance between the aluminum foil layer and the heat seal layeris seriously reduced or layered is solved, and the service life of the soft roll lithium battery is prolonged.

Description

technical field [0001] The invention relates to the technical field of lithium battery packaging, in particular to a passivation solution for a soft-pack lithium battery and a packaging material thereof. Background technique [0002] 3C electronic products represented by computers, communications and consumer electronics have driven the rapid development of the soft-pack lithium battery industry. In the past two years, the rapid development of new energy vehicles has led to a sharp increase in the application of soft-pack lithium batteries. [0003] With the rapid development of power vehicles, the application research of soft-pack lithium batteries has become a research hotspot. As one of the key materials of soft-pack lithium battery packaging materials, how to make the service life of power soft-pack lithium batteries reach 10 years is an important topic in the research of lithium battery packaging materials. [0004] The key packaging material for soft-pack lithium batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/05H01M2/02H01M50/124
CPCC23C22/05H01M50/124H01M50/1245Y02E60/10
Inventor 张学建徐孟进马亚男高秀芳冯慧杰千昌富王莉李茜茜柳青
Owner 乐凯胶片股份有限公司
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